Cooling attachment for ore-roasting furnaces



No. 625,608. Patented May 23, w.

J. E. BOTHWELL. CUULING AIT'ACHMENT FUR ORE ROASTING FURNACES.

(Application filed May 18, 1897.) (No Model.) 2 8hoetsSheet I.

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No. 625,608. Patented May 23, I899.

J. E. ROTHWELL.

COOLING ATTACHMENT FOR ORE BOASTING FURNACES.

(Application filed May 18, 1897.)'

(No Model.) 2 Sheets$heet 2.

Inven tor.

Attorney.

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r NITED STATES PATENT OFFICE.

JOHN E. ROTHWELL, OF BOULDER, COLORADO, ASSIGNOR OF TIVO-THIRDS TO THE STEARNS-RO GER COLORADO.

MANUFACTURING COMPANY, OF DENVER,

SPECIFICATION forming part of Letters Patent No. 625,608, dated May 23, 1899. Application filed May 18,1897. Serial No. 637,027. (No model.)

To all whom it may concern:

Be it known that I, J OHN E. ROTHWELL, a subject of the Queen of Great Britain, residing at Boulder, in the county of Boulder and State of Colorado, have invented a certain new and useful Improvement in Cooling Attachments for Ore-Roasting Furnaces, of which the following is a full, clear, and exact description.

The object of this invention is to provide means for cooling the hot ore as it is dis charged from roasting, drying, calcining, and other furnaces or apparatus on its way from the furnace to a place or apparatus for further treatment, it being desirable to cool the ore in order to facilitate its handling.

There is in use at this time what is known as the Pearce turret-furnace, (see Patents No. 488,797, dated December 27, 1892, and No. 506,129, dated October 3,1S93;)and my invention has been designed, primarily, as an attachment for that furnace in order to effect the cooling of the'hot ore, so that the roasted ore may be more readily and harmlessly'handled in the subsequent treatment thereof.

The invention comprises a casing or shell adapted to contain water or other cooling agent and provided with through-tubes for the passage of the ore through the cooling atmosphere, as I will proceed now more'particularly to set forth and finally claim.

In the accompanying drawings, illustrating my invention, in the several figures of which like parts are similarly designated, Figure 1 is a top plan view of one form of cooling attachment constructed in accordance with my invention. Fig. 2 is a vertical section taken in the plane of lines 2 2, Fig. 1. Fig. 3 is an end elevation. Fig. 4 is a horizontal section of portion of a Pearce turret-furnace with my invention applied, and Fig. 5 is a vertical section.

As at present planned the cooling device comprises a casing or shell a, containing transverse or vertical tubes 1), open at both ends, through which the hot ore descends, a stream of flowing water or other cooling agent, preferably under pressure, passing through the casing and about its tubes and serving to effeet the cooling of the ore in its passage through the tubes.

0 is the intake, and d the outflow, for the cooling agent.

The tubes b may have their lower ends simply spread in the bottom sheet a of the shell or casing, while their upper ends 11 may be spread and headed in the crown or upper sheet a of the casing; but I do not limit my invention to the manner of securing the tubes in the shell or casing.

The shape of the device may, and preferably will, conform to the hearth of the furnace,that shown beinga segment of the hearth of thePearce turret-furnace.

The attachment may be built into the fur nace-as, for example, upon the beams e e, which are set into the brickwork and from which the attachment is suspended by its brackets f.

g gare hand=holes for access to the casing for cleaning purposes.

The attachment is arranged at the discharge end of .the hearth and with its entrance end substantially on a levelwith the floor of the hearth, and the roasted ore is discharged from the hearth into the attachment by the rakes or stirrers or equivalent mechanism of the furnace and, falling slowly through the tubes of the attachment, is cooled. The cooled ore may fall thence upon a feeding device,whence or by which it istaken to a conveyer or elevator for further treatment. The flowing water insures a cooling atmosphere or agency in the attachment;

AlthoughI have shown cylindrical tubes, I do not limit myinvention thereto. Neither is the invention limited to the form of attachment shown. The gist of the invention is a tubular cooling attachment for ore roasting, drying, or calcining furnaces, arranged with its entrance substantially on a level with the floor of the hearth of the furnace, to which the hot ore may be fed and from which'the cooled ore may be removed in and by any appropriate automatic, gravity, or other means.

As already sufficiently indicated, the cooling attachment may beasection of the hearth in plan, or it'may be of other appropriate form to adapt it for economical application to the furnace or apparatus with which it is to be used, and it may be arranged in the hearth of the furnace or apparatus or outside of the same.

In Figs. 4 and 5 I have shown my invention as applied to the Pearce turret-furnace, and in said Views the parts shown and not described are common in the present conand with its entrance substantially level with the door of the hearth, and comprising the shell or casing a containing a series of tubes which open at both ends outside of said shell and through which tubes the ore passes by gravity as it is fed thereto, and means to circulate the cooling agent, such as water, through such shell or casing and around the said tubes, substantially as set forth.

In testimony whereof I have hereunto set my hand this 15th day of May, A. D. 1897.

JOHN E. ROTHWELL.

Witnesses:

WILLIAM A. SPRAGUE, THos. B. STEARNS. 

